Piping Rock, winner of the Horris Hill Stakes, has died following an attack of colic.
Trained by Richard Hannon, the Dubawi colt won each of his three starts in 2013, culminating in his Group Three triumph at Newbury.
Subsequently purchased by Godolphin, Piping Rock was attended by vets but they were unable to save the Classic hopeful.
Richard Hannon Jnr told www.godolphin.com: "The vets did everything possible for Piping Rock but very sadly there was nothing they could do to save him.
"Piping Rock hardly came off the bridle when winning all three of his races and showed in the Horris Hill Stakes that he was a genuine 2000 Guineas contender so it is very sad to lose such a good horse."
Simon Crisford, the Godolphin racing manager, said: "We had great hopes for Piping Rock and our thoughts are with the staff at Richard Hannon's yard. He is a terrible loss."